Tidy up project

.github/dependabot.yml

@@ -1,6 +1,12 @@
 version: 2
 updates:
-  - package-ecosystem: "github-actions"
+
+  - package-ecosystem: "maven"
     directory: "/"
     schedule:
       interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: Java CI
+
+on:
+  schedule:
+    - cron: '42 0 * * 4'
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v6
+    - name: Set up JDK 21
+      uses: actions/setup-java@v5
+      with:
+        distribution: temurin
+        java-version: 21
+        cache: 'maven'
+    - name: Build & run tests with Maven
+      run: ./mvnw -V verify

.mvn/maven.config

@@ -0,0 +1,7 @@
+--strict-checksums
+-Daether.checksums.algorithms=SHA-512,SHA-1,MD5
+-Daether.trustedChecksumsSource.summaryFile=true
+-Daether.trustedChecksumsSource.summaryFile.basedir=${session.rootDirectory}/.mvn/checksums/
+-Daether.artifactResolver.postProcessor.trustedChecksums=true
+-Daether.artifactResolver.postProcessor.trustedChecksums.checksumAlgorithms=SHA-512
+-Daether.artifactResolver.postProcessor.trustedChecksums.failIfMissing=false

.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,4 @@
+wrapperVersion=3.3.4
+distributionType=only-script
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.12/apache-maven-3.9.12-bin.zip
+distributionSha256Sum=305773a68d6ddfd413df58c82b3f8050e89778e777f3a745c8e5b8cbea4018ef